首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   12222篇
  免费   118篇
  国内免费   11篇
教育   7956篇
科学研究   2193篇
各国文化   99篇
体育   836篇
综合类   5篇
文化理论   90篇
信息传播   1172篇
  2021年   111篇
  2020年   149篇
  2019年   243篇
  2018年   308篇
  2017年   288篇
  2016年   238篇
  2015年   174篇
  2014年   223篇
  2013年   2316篇
  2012年   247篇
  2011年   229篇
  2010年   201篇
  2009年   196篇
  2008年   195篇
  2007年   217篇
  2006年   160篇
  2005年   172篇
  2004年   159篇
  2003年   156篇
  2002年   170篇
  2001年   197篇
  2000年   208篇
  1999年   176篇
  1998年   93篇
  1997年   109篇
  1996年   130篇
  1995年   97篇
  1994年   112篇
  1993年   107篇
  1992年   144篇
  1991年   158篇
  1990年   162篇
  1989年   179篇
  1988年   123篇
  1987年   120篇
  1986年   152篇
  1985年   153篇
  1984年   132篇
  1983年   132篇
  1982年   120篇
  1981年   96篇
  1980年   104篇
  1979年   137篇
  1978年   113篇
  1977年   104篇
  1976年   106篇
  1975年   82篇
  1974年   100篇
  1973年   86篇
  1971年   95篇
排序方式: 共有10000条查询结果,搜索用时 390 毫秒
91.
92.
93.
94.
In this article, we build on Stigler and Becker’s (1977) “consumption capital theory” and propose a novel conceptualization of film quality for the analysis of motion picture franchises. Generally, this theory predicts that the utility consumers derive from a particular good or service increases with prior consumption. We test our theoretical conjectures by drawing on the population of sequels that were running in the US between 1992 and 2011. The empirical results point to the explanatory power of the proposed framework. Film executives may use our findings to improve the profitability of their sequel productions. From a theoretical point of view, consumption capital theory allows for a more refined analysis of sequel performance along different dimensions. Moreover, it may provide a fruitful basis for the analysis of other serial media content, including books, TV, music, and games.  相似文献   
95.
Rapid advances in technology have provided the potential to connect citizens to their surroundings in unprecedented ways. While many scholars examine different types of efficacy as a predictor of behavior (e.g., internal, external, and political), it is essential to examine how confident citizens feel in their ability to use the technology before understanding how they will use it politically. Research shows that perceived competence increases motivation, which is correlated with behavior. This study examined how traditional measures of efficacy and a new measure affect online political behaviors, concluding that technological efficacy is a reliable construct predicting online news use and expression.  相似文献   
96.
97.
98.
Teacher performance evaluation currently is receiving unprecedented attention from policy makers, scholars, and practitioners worldwide. This study is one of the few studies of teacher perceptions regarding teacher performance measures that focus on China. We employed a quantitative dominant mixed research design to investigate Chinese teachers’ preferences for teacher performance measures and the possible reasons for their preferences. Considering the quantitative results, the surveyed Chinese teachers identified fulfillment of additional roles, collaboration with faculty and staff, and students’ test scores as the most important measures for performance evaluation. Qualitatively, the most important measures that the surveyed teachers reported were the teacher’s morality, workload, and students’ test scores.  相似文献   
99.
Lumbar-pelvic kinematics change in response to increasing rowing stroke rates, but little is known about the effect of incremental stroke rates on changes in joint kinetics and their implications for injury. The purpose of this study was to quantify the effects of incremental rowing intensities on lower limb and lumbar-pelvic kinetics. Twelve female rowers performed an incremental test on a rowing ergometer. Kinematic data of rowers’ ankle, knee, hip and lumbar-pelvic joints, as well as external forces at the handle, seat and foot-stretchers of the rowing machine were recorded. Inter-segmental moments and forces were calculated using inverse dynamics and were compared across stroke rates using repeated measures ANOVA. Rowers exhibited increases in peak ankle and L5/S1 extensor moments, reductions in peak knee moments and no change in peak hip moments, with respect to stroke rate. Large shear and compressive forces were seen at L5/S1 and increased with stroke rate (< 0.05). This coincided with increased levels of lumbar-pelvic flexion. High levels of lumbar-pelvic loading at higher stroke rates have implications with respect to injury and indicated that technique was declining, leading to increased lumbar-pelvic flexion. Such changes are not advantageous to performance and can potentially increase the risk of developing injuries.  相似文献   
100.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号